Jumping jack



M r 1927' l. BALMER JUMPING JACK Filed May 24, 1926 Patented Mar. "29, 1927. V

PATENT OFFICE.

IRVIN BALMER, OF ALEDO, ILLINOIS.

JUMPING JACK.

Application filed ma 24,

The invention relates to jumping jacks, and has as an object the provision of a metallic frame for a toy of this character preferably made of a single piece of material.

A further object of the invention is the provision of a frame for jumping jacks. made of flattened metal having a portion of the frame turned edgewise to provide stiffness to resist the strain of operating the jumping jack.

Further objects of the invention will appear from the following description when read in connection with the accompanying drawing, wherein:

Figure 1 is a front elevation.

Figure 2 is a side elevation with a second position of the jack shown in dotted lines, and

Figure 3 is a plan view.

As shown, the toy comprises a jumping jack having a body suspended from arms 11, 12, washers 13, 14 being provided between the body and the arms to space them apart a sufiicient distance to allow the legs l5, 16 to pass freely between the arms in the movement of the toy.

The arms, body and legs are desirably formed of sheet metal. The arms, as shown, are formed of a single piece of material, being joined at their upper end by a strap 37 integral with each of the arms and extending parallel with and. above the cord 18, 19, which is passed through spaced perforations in the upper portions of each of the arms.

The legs 15, 16 are shown as pivoted loosely to the body in the usual manner. The body is also freely movable about the pivot 17 which suspends the same from the arms.

The arms are shown as suspended from the parallel portions 18, 19, of the cord, which cord is twisted at 20 and 21., and the bights thereof are in engagement with hooks 22,- 23 carried by the extremities of the frame. The jack and its suspension by the cord. are in accordance with the usual practice in this class of devices.

By the invention described and claimed herein the frame is made of a single piece of strap material and comprises vertical handle forming members 25 connected at their lower ends, at 26, to provide a handle, and other parts, 27, 28, connected at 29, to form a second handle. The continuation of 1926. Serial N0. 111,247.

the handle portions 25, 27 is carried across the frame, at 30, and provides the single rigid connecting element between the two sides of the frame. 1

The member 30, by its resilience, allows the handles to be pressed toward each other, with consequent tension upon the cord, 18, the resilience of the member 30 restoring the-parts to normal position when the pressure is removed.

To transmit the strain to the cord 18 when the handles are pressed together, the sides of the frame, comprising upward extensions of the handle members 24, 28, are turned at 31, 32 to cause the sides of the frame 33, 34, to present their edges laterally of the structure, whereby the greatest stiffness to transmit force to the cord 18 is provided.

The side members 33, 34 adjacent their upper extremities are turned through 90, at 35, 36, and the extremities themselves are turned into the hooks 22, 23 already referred to.

The operation of the device will be clear from the above description. When the handles are pressed toward each other in the grasp of the user, the cord 18 will be placed under strain and will tend to straighten with revolution of the part in contact with the ends of the arms 11, 12. This will cause the jack to raise toward the position shown in dotted lines, invFig. 2, and by centrifugal force the legs and body of the jack may be caused to perform a great number of gyrations.

Minor changes may be made in the phys ical embodiment of the invention without departing'from the spirit thereof.

. claim:

1. A frame for a jumping jack comprising handles of resilent strap material occupying substantially parallel planes, each handle comprising inner and outer connected mem bers, a cross member integral at each end with one of said inner handle members, said cross member preserving a spacing of said handles and by its resilience tending to maintain the spacing thereof, side frame members comprising upward extensions of said handle members twisted into a common plane substantially opposite said cross member, and means carried by the extremities of said side members for attachment of a jumping jack.

2. A frame for a jumping jack comprising handle members of resilient strap material lying in substantially parallel spaced planes and formed of material doubled on itself at the lower end of each handle, a spacing member integral with the inner member of said handle member holding the sides of said frame in spaced relation and by its resiliency tending to return said handles to substantially parallel positions, side frame members each intergral with one of the outer members of said handles, said frame members twisted adjacent said cross member to lie in substantially the same plane, means at the upper end of said side frame members for attaclnnent of a jumping jack.

3. A frame for a jumping jack comprising}; members of resilient strap material doubled on. itsell at the lower ends of the respective handles, a resilient cross member integral with the inner members of the handles and holding said handles in spaced relation, side frame members integral with the outer handle members respectively rojecting upward therefrom and turned into substantially a common plane adjacent said cross member, said side frame members again turned to bring their extremities into the plane of said handle members and hooks carried by the extremities of the side frame members for engagement with a jumping jack operating cord.

t. A jumping jack comprising, in combination, separable side members, a jack member for suspension from normally twisted cords and adapted to be moved by nntwisting tension upon said cords, said ack comprising a body, arms pivoted upon said body and connected at their distal ends by a spacing; member, said member and arms formed from a single piece of lat material, and said arms having apertures therethrougrh to receive means for connecting them with the body, said cords directly connecting said arms in spaced relation adjacent said side members.

IRVIN BALMER. 

